b$.($i$)$ Draw the open chain Fischer projection of D$-$glucose.

$($ii$)$ Draw the cyclic Fischer projection of $-$D$-$glucose.

$($iii$)$ Draw the cyclic Fischer projection of the C$-4$ epimer of $-$D$-$glucose.

$($iv$)$ Draw the Haworth projection of the C$-4$ epimer of $-$D$-$glucose.

$($v$)$ Draw the chair conformation of the $C-4$ epimer of $-$D$-$glucose

$($vi$)$ How many asymmetric carbons are in an aldohexose? How many aldohexose stereoisomers are possible?